Improvement in blind and shutter fastenings



NITE-D STATES DANIEL E. TRUE, OF LEOMINSTER, MASSACHUSETTS.

Specification forming pari of Letters Patent No. 13,5 33, dated July 12, 1864.

To all u'hom it may concern: A

Be it known that I, DANIEL E. TRUE, a resident of Leominster, in the county of Berkshire and State ot' Massachusetts, have invened an Improved Apparatus for Operating and Fastening Window Blinds or Shutters; and do I hereby declare the same to be transverse section of the slotted pla-te, the

toothed rack, and the stud of the blind and its operative arm.

My present invention, although in some respects like that described in Letters Patent No. 13,890, granted to me on the 4th day of December, A. D. 1855, yet differs in others materially therefrom and can be used to better advantage.

In the drawings, A denotes a windowframe containing one or more window-sashes, B, and having a blind, G, applied to it in the ordinary manner-that is to say, so as to swing on hinges, one of which is represented in Fig. 1 at a. To the lower surface of the lower bar of the blind a slotted plate, D, is

affixed, such plate being made with a straight slot, b, in it for the reception ot' a headed stud, c, projecting upward from a curved arm, E. Furthermore, there is applied to and so as to project downward from the plate D a toothed rack, F, which engages with a toothed sector, G, fixed to the arm E, and having its arc of teeth concentric with the stud c, the whole being as shown in Figs. l and 2. The arm E at its inner end is jointed to another arm, H, which` projects from a toothed sector, I, which is supported'on a vertical fulcrum or pin', d, and is placed within an open box or case, K, secured to the window-frame sill andy underneath the sash. Another toothed sector, L, fixed to a vertical shaft, e, engages with the sector I. A crank, K, jrojects from the shaft e and in rear of the sash, andy should be so applied to theA shaft c as to be capable, while being turned ot putting such shaft in rotary movement. The application ot the said crank Kto the said shaft e shouldalso be such as to enable the crank to be raised o n and ott either of two locking studs,f g, arranged as shown in the drawings.

Fig. 5 is an end view of the crank, showing it as provided with two beveled projections, L i, to operate with the studs f g, and aid in holding the blind locked when either open or closed. By turning the crank the sector L will be putin rotation and will move its fellow sector I, which in turn will move thc arm H through the sector of a circle, the same causing the arm E, its stud c, and sector G, to so operate with the slotted plate l) and its rack F as to either open or close the blind, as circulnstances may require.

From the above it will be seen that the blind will be moved by a power eXertedon the inside of the `Window or within the building ot' which such window may be a part. The toothed sector G and rack F not only operate to aid .the arm E in moving the blind, but to maintain the stud c in its due position within and prevent itfrom binding in the slot b. The toothed gears or sectors I L, the crank K, and the locking-studsfg not only enable the lever or arm H to be moved to good advantage, but to be locked in position when the blind is either open or closed.

I do not claim a combination of bent levers for opening or closing a blind from the inside of a window, as such a mechanism is well' known 5 but What I claim as my present invention is as follows, viz:

l. The combination and arrangement` of the toothed sector G and rack F with the slotted plate D of the blind and with the stud c of the arm E, combined with an operating lever or arm, H, as specified.

2. In combination with the arm H and its arm E, applied to the blind, the two sectors I L, the lockingcrank, and the two studs f g, the whole being to operate as specified.

DANIEL E. TRUE.

Witnesses:

R. H. EDDY, F. P. HALE, J r. 

